Window roller replacements

A handy person from Summerfield Florida says:
I need to replace the rollers for my sliding windows. The plastic housing is 1 7/16 inches long, 1/2 inch wide, and 1/2 inch wide. The rollers are metal which has rusted. The windows are approximately 20 years old. I am not sure if replacing the roller or the roller and housing is needed. Also the suggested part number(s). Thank you.
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Paul from SWISCO responded:

Look over the dimensions of our 87-218 roller assembly and see if these are compatible with yours. 

A handy person from Summerfield Florida says:
Thank you for your help. These will work.
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Paul from SWISCO responded:

You're very welcome. Be sure and let us know how everything works out for you.

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